Car-roof.



'WL P. MURPHY.

CAR ROOF.

'APPLJcATmN- FILED Dic. 6. 1915.

1,250,624. lFatemi Dea.M 18, i917.

n e n n o wld'.

UNITED STATES ,PATENT OFFICE.

WALTER I. MURPHY, OF CHICAGO, ILLINOIS, ASSIGNOB TO P. MURPHY COMPANY,

' OF PABNASSUS, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

cnn-Boor.

To all whom it mag/concern.'

Be it knovvnthat I, llnrrnn P. MURPHY,

' i la citizen of the United States, and a resident t and useful Improvement in Car-Roofs, `whicli the following is a speclfication.

of thecity of Chicago, in the county oi." Cook and State of Illinois, have invented a new This invention relates to roofs composed of heavy gage steel plates which are securely riveted or otherwlse rigidly attached togethcr and-to the car frame, and is an improvemcnt vin car roots of the type shown in my- Patent No. 1,133,495, 1915.

' the car roof and sides by means of the shape fand arrangement of the cal-lines and roo plates, to stiften the roof plates and prevent sweating of the roof plates on their under sides and provide a smooth ceiling without by means cf hangers from the roof itself to. keep the roof plates from sweating and to weatherproof; also, .sides ot' the roof materially diminishing the headroom in the the weight of theroof car, and to decrease p without impairlng its strengtlnand durability.

The invention consistsin utilizing plates of narrower width and heavier gage metal near the, middle of the oar thanat the-.ends thereof and in capping the seams with ex .terior carlines, which are thus more closely spaced in the middleof the car than at its ends; also, in providing heavy gage metal -seam covers or outside oarlines having a greater vertical depth at the ridge than at theeaves and lateral base flanges of greater Width lat the eaves than at the .ridge'and riv- 'etin them securely to the frame ofthe car at t leir eaves ends; also, in the eaves endV construction of the seamoovers to make them in. sheathing the under plates with thin wood boards supported upon theside plates and `assist the roof plates in carrying the loadsto which they maybe subjected; and also in the' detailsrof construction hereinafter described.

` Further vobjects ofthe invention appear connection with the description of thecar rooil embodying the invention shown in the accompanying drawings, and what is claimed herein asthe invention is stated in W'the'appended claims.

Specication of Letters Patent. Patented Dec. 18, 1917.

Application ined December e, 1915. serial No. 65,174.

In the drawings, wherein the Same reference characters designate like parts in the several views,

Figure 1 isfa plan view of the middle portion ofa car roof embodying the invention, partly broken away to disclose the construction of the under portion;

Fig. 2 is a cross-section of the same on the l1ne '2-2 in Fig. 1;

Fig. 3 is a perspective view of an end portion of aseam cover; and

Fig 4 isa longitudinal sectional view of Fig. 1 on a line between the alge and the eaves.

The ca r shown in the drawings'h'sZ-bar side plates 11 arranged with' theiiiwebs' vertical and .their top flanges, facing inward. An angle bar 12 is secured lofthe'onter side of the web of each side plate, with itshori.- .zontal ange up and facing outward, forming an eaves molding for the roof. The tops of the 'angle bars 12 are spaced slightly above the to s of the Side plates 11, The metal roofp ates 13, 14 are arranged cross'wise of the car, extending from eaves to eaves and resting at their ends upon the top .ia'nges of the car. The side mar ins of thereof p ates are flanged up and lai in contact alongside ofpeach other; and metahseam covers 15 are I placed one over each pair of upturned roof plate lianges and are ri idly secured thereto by rivets or other suita le fastenngmeans The s eam covers 15 are ofinverted U- shape wlth lateral flanges-16. projecting out from the lower edges of their-side walls and 100 'restlng on the. roof plates. Their ends are closed by lengthwise projections or tabs 17' from one side wall, which are' bent acrossA the space between ,the side walls and riveted tothe other 'side wall, as shown in Bulbs y The top edges of` the seam covers project over the 'folded endl tabs to cover 'their' upper' edges and make s tight joint." The' seam covers' are of greater depth attire rid e'* thain at'the eaves, eachone decrea'sin'gm up i j supported on aiidsecured to the seam covers outside carlines'.

depth uniformly from the middle toward the ends; and the lateral flanges 16 are lwider at the eaves than at the ridge, each flange growing narrower uniformly from the ends to the middle of the seam cover. The ends of the flanges 16 are riveted or otherwise securely fastened to the eaves angles 12. v

Their flanged'and tapered shape makes ,the s ea'm covers very stiffA against both vertical loads on the roof and horizontal forces tending to spread `or twist' the side plates, and enables the seai'n covers to function as heavy gage roof plates14 at the middle of the car together'constitute 'a very stiff and solid brace across the top of the car at thedoors, and hold theside plates from spreading or moving endwise with respect to each other. j

The lwood running boards 18 are fastened to metal running board saddles 19 which are 15 along the ridge. A sheathing or lining '20 of thin wooden boards is arranged beneath 'the roof plates to prevent condensation of moisture, or sweating, on their under sides. The ends of the lining boards rest on the top flanges of the side plates, and the middle portions are held up to conform to the arch of the root' plates by metal rods or bars 21 which are suspended from the roof by means -of hangers 22 projecting down from 4plates and seam covers.

between the root plate flanges at the ridge. The hangers 22 are riveted or otherwise securely fastened to the flanges of the root1 The arched form of the lining boards and their manner 'of support gives them sufficient stiffness to support the lighter roof sheets between their edges.

From the foregoing description it is evident that this invention enables a very strong, light roof to be,made,'having ample stiffness where required to brace the top of the sido walls ot the car.

' rivet holes through the roof plates into the car, and the sheathing prevents sweating `and St'itfens the thinner roof' plates at the ends of the cai'.

The invention is not restricted to the particular shapes and arrangements-of parts shown in the drawings.

I claim the following as iny invention:

y 1. A car roofI given :i truss construction longitudinally as well as transverselyof the car,coin1'io fad oli aplurality of. plates running. transversely ol' thecar and rigidly secured together at their edges to act as a unitary longitudinal lgiider,y the truss conformation beingsccu red by the use ot' plates of different gages, thicker-gages ot' plates being placed in the middle `of the car-"than at' the ends. d

2.v A car roof comprisingI roof plates ex- Theseain covers and the- There are no tendincrosswise of' the car and rigidly secure at their ends to the top of the side walls of the car, and stifi'ening membersspanning from side to side of the car and secured to thev outer edges of the roof plates,

lthe roof platesat the middle of the car being of. heavier gage and narrower width than those at the ends of the car for bracing the car sides horizontally, and the stiffenin'g members being spaced-closer together at the middle ofthe car than at the endsv of the car, whereby theroof plates and stif'lening members Aarebett'er enabled to take Careof the stresses occasioned by the`v weaving of the car.

3. A. car roof comprising upwardly curved metal lroof plates extending from eaves to eaves and having upstanding flanges along` l their side margins, and cover strips of A,inverted U shape with Aoutwardly projecting flanges along the bottom edges of the side walls upwardly curved to conform to said roof plates andr arranged over the adjacent flanges of said roof plates, said coverjstrips having a greater height at the ridge than yat the eaves of the root' and their bottoni flanges having a greater width at the eaves than at the ridge of the roof, and means'for securing ,said flanges and cover strips together 'to form a` rigid joint, whereby said roof plates and cover stripstogether constitute transverse supporting and stiffeninfg v members for the sides of the car.

4. A car root comprising upwardly curved metal roof plates extending trom'eaves to eaves and -having upst-anding flanges along their side margins, cover strips of' inverted U shape upwardly curved to conform to said root' plates and arranged ovcrtlie adjacent flanges ot said root' plates, said cover strips having a greater width at the caves than at the ridge of the roof', ineansrfor.

securing said flanges and cover stripsl together to form a rigid joint, and continuous cave strips arrangedlengthwise of said root under. the eaves ends of said i'ooi' plates and rigidly simuredthercto and to the en ds of' said cover strips, whereby said roof plates and coverv strips together constitute a ribbed arch yconnecting said eavesl'strips and thereby'support the sides of the car laterallyand stiffen them and the root lengthwise of' the car.

A car roof comprisingupwardly curved root plates extending crosswise of thecar andcorrespondingly curved sti llening :nembers spanning the car from' side to sideand rigidly secured to the outside of said roof" plates at their edges, lining boards extending acrossi said car beneath said roof plates and in contact therewith, said lining boards being supported on the sides of the ear at their ends and bowed up 'against the under by hangers arranged between the edges of -side of the roof sheets betweenl their ends said roof plates and supported by said stiffening members, whereby said lining boards act as arches to stifi'en the roof plates.

G, A-car roof comprising upwardly curved roof plates extel'iding crosswise of the car and having their side margins flanged and secured together, the ribs thereby formed spanning the ear from side to side, npwardly bowed lining boards s'aid roof plates, said lining boards being Supported at their ends from the car sides,

and suspended intermediate their ends fromr the car roof by hangers secured 'to the edges of said rooi plates, and nitermediate supports for the lining boards carried by said hangers, whereby said lining boards act as' arehes to stii'en said roof.

7. A self-supporting car roof comprising extendingV .across sald car beneath andv 1n Contact with riveted to said flanges, hangers arranged between the langes of adjacent sheets and secured thereto, the lower edges of said hang ers projecting below said sheets and supporting longitudinal' brace members, and roof lining arranged in sections beneath the roof sheets between said hangers and supported by said longitudinal brace members, whereby said seam covers and roof sheet flanges stiifen said roof at the seams and support said lining and roof sheets.

S. A car roof comprising roof plates eX- tending erosswise of the oar and ri idly secured along .their ends to the top 0% the side walls ofthe ear, and stiffening members spanning from side to side of the car at each roof joint, the sheets in the middle part ott' the car being narrower than those of the end portion of the car, whereby the stitfei'iing members are closer together in said middle portion.

Signed at Chicago, lll., this third day of December, 1915.

WALTER r. MURPHY. 

